Nest Thermostat 3rd Generation – Review

Nest Thermostat 3rd Edition

Nest Thermostat – 3rd Generation

The Nest thermostat is the flagship product from smart home manufacturer Nest, the home automation company bought by Google.

Design and Features

The Nest thermostat is by far the most attractive and best built smart thermostat we have installed & seen – it oozes premium build quality. The flawless machined finish is a beautiful touch and the cylindrical aluminium chassis rotates for menu navigation and manual temperature adjustment using a weighty, clicker motion.

Nest’s proximity sensors recognise movement – so it knows when to automatically turn down the temperature when the house is empty – but don’t worry the sensors won’t be triggered by your pets.

Users can set predefined schedules, but the Nest will also learn patterns based on when you are home and away so you don’t need to program at all. Lastly, like all rivals, its temperature can be controlled remotely from both a web browser and/or an iOS or Android app.

Here’s a summary of the features which have changed:

  • Hot water control: you can give a hot water boost and adjust the schedule from the thermostat or your phone. It works with Auto-away and turns off the tank heater after two days.
  • Bigger, higher-resolution display: the display is now 53mm across, and has a resolution of 480×480.
  • A new Farsight mode lets you set the display to show the target temperate or a clock so you can see it from across the room.
  • OpenTherm support: Works with compatible boilers to enable two-way communication instead of simple one-way on/off commands from the thermostat. With OpenTherm, the Nest helps the boiler work out the exact amount of gas to burn to reach or maintain the temperature. This should save energy and prolong the life of your heating system.
  • Thinner profile: The new unit sits more flush against the wall.
  • There’s also a new stand (sold separately).


Installation is usually relatively straight forward, and like Nest, we highly recommend you have the nest thermostat professionally installed because of the high voltages involved and sometimes complex wiring to some systems.

The Heatlinks 12v dc output allows your to hook up the heat links terminals to your existing wired thermostat (if its hard wired) and then the Nest Thermostat is powered directly from there.

If you don’t have a wired thermostat then you can power the Nest via USB, and the Nest Stand and this will come with a cable and suitable stylish usb transformer plug. 

Recently Nest has added:

The 3rd-gen Nest Thermostat’s Bacteria Prevention mode will be activated if your domestic water hasn’t been heated for at least 2 consecutive hours in the last 48 hours – help fight the potential lethal Legionella bacteria.

They have also added two-factor authentication to its app to better protect your Nest Products – from hackers. To enable it go to the Nest app, tap the menu icon at the top left, then go to Account security. You’ll see an option there to activate ‘2-step verification’. The next time you sign in (you may have to sign out manually) you’ll enter your password as usual, then you’ll get a text with the verification code. Tap this in and you’ll get into the app.

With the 3rd-gen model you can now choose between four colours. In addition to the stainless steel model, there’s copper, white and black. They cost the same as the stainless steel model.

Pros Cons
Great Design

Supports Google & Alexa

Integrates well with other Google and Nest products


Installation requires working on your home wiring

Does not integrate with Apple Homekit.